Hittite HMC792LP4E DC-6 GHz数字衰减方案

HittiteHMC792LP4EDC-6GHz数字衰减方案Hittite公司的HMC792LP4E是DC-6GHz6位数字衰减器,增量0.25dBLSB,最大衰减到15.75dB,IP3输出高达+55dBm,2.0GHz的插入损耗为1.8dB,单电源3V或5V工作,主要用于蜂窝/3G基础设备,WiBro/WiMAX/4G,微波无线电和VSAT,测试设备和传感器,IF和RF应用.本文介绍HMC792LP4E主要特性,功能方框图,应用电路,评估板PCB布局图和材料列表.

HMC792LP4E:0.25dBLSBGaAsMMIC6-BITDIGITALATTENUATOR,DC-6GHzTheHMC792LP4Eisabroadband6-bitGaAsICDigitalAttenuatorinalowcostleadlessSMTpackage.Thisversatiledigitalattenuatorincorporatesoff-chipACgroundcapacitorsfornearDCoperation,makingitsuitableforawidevarietyofRFandIFapplications.

ThedualmodecontrolinterfaceisCMOS/TTLcompatible,andacceptseitherathreewireserialinputora6bitparallelword.TheHMC792LP4EalsofeaturesauserselectablepowerupstateandaserialoutputportforcascadingotherHittiteserialcontrolledcomponents.TheHMC792LP4EishousedinaRoHScompliant4x4mmQFNleadlesspackage,andrequiresnoexternalmatchingcomponents.

HMC792LP4E主要特性:

0.25dBLSBStepsto15.75dB

Power-UpStateSelection

HighInputIP3:+55dBm

LowInsertionLoss:1.8dB@2.0GHz

TTL/CMOSCompatible,Serial,ParallelorLatchedParallelControl

±0.2dBTypicalStepError

Single+3Vor+5VSupply

24Lead4x4mmSMTPackage:16mm2

HMC792LP4E典型应用:

TheHMC792LP4Eisidealfor:

•Cellular/3GInfrastructure

•WiBro/WiMAX/4G

•MicrowaveRadio&VSAT

•TestEquipmentandSensors

•IF&RFApplications

图1.HMC792LP4E功能方框图

图2.HMC792LP4E应用电路

Forfrequencieslessthan700MHz,theuseofACGcapacitorsC4,C5andC6isrecommended.Forfrequenciesgreaterthan700MHz,theHMC792LP4EhassimilarperformancewithandwithouttheACGcapacitors.

图3.HMC792LP4E评估板PCB布局图

评估板PCB118853材料列表:

详情请见: